How does the D3 achieve such high ISO?

Started Feb 17, 2008 | Discussions thread
raoulJ Contributing Member • Posts: 701
Re: Reduce your 1DsIII image to 12MP (about 50%)

Hans Kruse wrote:

Eric Sorensen wrote:

...then compare with the D3 and tell us how the noise looks at the
new and equal 100% level. This is the difference you will see when
the same framed image is printed the same size. I bet it's close, if
not in Canon's favor.

As mentioned in a previous post I see the noise when down sampling to
the same resolution of the 5D, that the 1Ds3 and 5D is pretty close.
So not quite up the level of the D3.

A German Photo Magazin made a test with results that can be shown in
the following charts

and on the pixel level

This basically shows that there is no free lunch. The D3 achieves the
performance at the expence of details and resolution on the basis of
this test. RAW files from the D3 look less detailed and sharp than
pictures from the 5D is what I have seen. But this is an area where I
have seen no camera reviews really look at (other than the German
Foto Magazin). This is a bit surprising as one would think that a
camera reviewer would be critically looking at this area.

Well, in the last issue of french magazine "Chasseur d'images", they compare the results on same size print for D3 and 1DS3 at 1600 ISO.
The 1DS3 wins with head and shoulder.
They rate the 1DS3 at 185 against 137 for the D3.

More resolution helps a lot when big prints are the goal. And big prints is what matters, after all, isn't it ?

To be honest, 1600ISO seems the limitation for the 1DS3 however. Above that, the D3 seems to perform better. They don't give a figure for higher sensitivity.

They probably will in the future, as it's their brand new high ISO resolution test...

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